Which expressions are not polynomials? −ab^2c −4x^1/3 2q−1 5−1/z

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.